Acura Legend Oxygen Sensor Replacement at your home or office.

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Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Acura Legend Oxygen Sensor Replacement is $141 with $46 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1988 Acura LegendV6-2.7LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$213.95Shop/Dealer Price$256.19 - $343.54
1989 Acura LegendV6-2.7LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$193.95Shop/Dealer Price$236.22 - $323.59
1992 Acura LegendV6-3.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$491.71Shop/Dealer Price$608.42 - $919.11
1992 Acura LegendV6-3.2LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$487.69Shop/Dealer Price$603.36 - $911.00
1995 Acura LegendV6-3.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$491.71Shop/Dealer Price$608.45 - $919.16
1990 Acura LegendV6-2.7LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$193.95Shop/Dealer Price$236.22 - $323.59
1991 Acura LegendV6-3.2LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$298.35Shop/Dealer Price$365.23 - $526.97
1988 Acura LegendV6-2.7LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$192.35Shop/Dealer Price$233.39 - $316.11
Show example Acura Legend Oxygen Sensor Replacement prices

What is the Oxygen Sensor all about?

With each new model year, manufacturers are adding more oxygen sensors to better manage engine operation. Some high performance engines have an oxygen sensor for each cylinder as well as one for the rear of each catalytic convertor. The sensors are located either underneath the hood or underneath the car. The oxygen sensors are connected (screwed) to the exhaust pipe, either in front or back of the catalytic converter. The front (upstream) sensors measure the amount of oxygen in the exhaust system. The purpose of the front oxygen sensor(s) is to measure how rich or lean the gases are as the gases exit the combustion chamber. Depending upon whether the exhaust gas is lean (high in oxygen content) or rich (low in oxygen content), the amount of fuel entering the engine is adjusted by the engine management computer to try and maintain an ideal mixture that produces the lowest emissions output from the catalytic convertor.

Rear (downstream) sensors are located behind the catalytic converter. The purpose of the rear oxygen sensor(s) is to monitor the oxygen content of the exhaust gases leaving the catalytic convertor.

If one or more of the oxygen sensors are faulty, your car may not pass the emissions test. If you drive your car with a faulty oxygen sensor, you may get poor gas mileage and it can damage the catalytic converter.

Oxygen Sensor-MATROX-1

When replacing the oxygen sensor remember:

  • Many oxygen sensors are damaged by leaking oil or coolant. If that is the case, the cause of that leak needs to be identified and repaired, or else the replacement oxygen sensor will be damaged as well.
  • New vehicles require specific oxygen sensors, and not the universal sensors that were common prior to 1996.

How it's done:

  • Scan the computer in the car for codes.
  • Inspect for vacuum leaks and holes in the exhaust system.
  • Remove and replace the oxygen sensor if it is bad.
  • Check electrical connections.
  • Check for proper operation of oxygen sensors.
  • Clear diagnostic codes.
  • Test drive car.

Our recommendation:

Keep up with the tune-ups. If check engine light is on, don't drive the car too long without getting it inspected. If check engine light is flashing, pull over and get the car towed to avoid costly repairs. Ask the mechanic to inspect the vacuum hoses and leaks in the exhaust system. If the vacuum hose or exhaust system is leaking, it will display an oxygen sensor fault code. Replacing an oxygen sensor may not fix the problem.

What common symptoms indicate you may need to replace the Oxygen Sensor?

  • Check Engine light is on.
  • Car is getting poor gas mileage.
  • Emission test fails.

How important is replacing the oxygen sensor?

Your vehicle has multiple oxygen sensors, and they all help the car run optimally. The front sensors measure how much oxygen is in the exhaust stream to measure how rich or lean the gases leaving the gas chamber are. The rear sensors measure the oxygen content of the gases as they leave the catalytic converter. The oxygen sensors then relay this information to your vehicle’s electronic control unit, so that it can adjust as necessary. Because cars depend on an ideal fuel-to-air ratio to function optimally, the oxygen sensors are leaned on for engine performance. When your oxygen sensors fail your car will run less smoothly, get worse mileage, and have worse emissions.

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Meet some of our expert Acura mechanics

Real customer reviews from Acura owners like you.

Excellent Rating

(43)

Rating Summary
39
2
1
0
1
39
2
1
0
1

Robert

31 years of experience
641 reviews
Robert
31 years of experience
Acura Legend V6-2.7L - Starter - Portola Valley, California

John

20 years of experience
563 reviews
John
20 years of experience
Acura Legend V6-3.2L - Coolant is leaking - Orlando, Florida
John was very nice, professional, knowledgeable, and efficient! He answered all my questions and helped me understand what was going on with my car. If you're clueless about cars, like me, and want someone you trust working on your vehicle, I highly recommend him!

Lamont

30 years of experience
62 reviews
Lamont
30 years of experience
Acura Legend V6-3.2L - Oil Change - San Pablo, California
Great mechanic and honest.

Michael

16 years of experience
606 reviews
Michael
16 years of experience
Acura Legend V6-3.2L - Pre-purchase Car Inspection - Duluth, Georgia
I had Michael go out and inspect a 1993 Acura Legend for me in Georgia. He called me and gave the car a rave review with only small cosmetic issues here and there. I went ahead and purchased the vehicle and had it sent out to DC. Upon delivery, the car jerks when you go in reverse and shift from 1st to 2nd gear. There's also a buzzing noise coming from the rear. After having the car inspected by the Acura dealership, they informed the engine mounts need to replaced and that the buzzing noise is from my rear wheel hubs/bearings which also need to be replaced. All together, I was quoted $1842 from an Indy mechanic. I'm very disappointed that these issues were not brought up during our initial conversation. From the moment you start the car and put it in gear, the jerk and noises are very apparent. Now I have to shell out an additional $1842 since these items need to be fixed in order to pass state inspection and register the vehicle. I'm not a happy camper

Excellent Rating

(43)

Rating Summary
39
2
1
0
1
39
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Number of Acura Legend services completed
473+
services done by our mechanics
TOTAL NUMBER OF EXPERT Acura MECHANICS
900+
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